Determination of the sound energy level of a gunshot and its applications in room acoustics

Deželak, Ferdinand; Čurović, Luka; Čudina, Mirko

doi:10.1016/j.apacoust.2015.12.001

Cited by 11 publications

(7 citation statements)

References 4 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Concerning the question of repeatability, Dezelak et al [90] state that differences in the noise characteristics between individual cartridges for the same gun are usually small, so the impulsive source can be replicated to a high degree. However, a study by Maher and Routh [81] comparing the on-axis peak pressure levels for ten shots for different handguns revealed that variability was observed among different guns.…”

Section: Gunshotmentioning

confidence: 99%

“…Regarding frequency response, several studies have shown that energy falls rapidly in the low-frequency range for handguns [71,79,[89][90][91]. The frequency spectrum of a gun typically has a peak energy output in the 1 kHz to 2 kHz region [71].…”

Section: Gunshotmentioning

confidence: 99%

“…In a study by Bradley [92], comparisons between measured values and calculated values (RT, C 80 , C 50 and C 35 ) based on ideal exponential decays showed that such predictions are not particularly accurate but give an indication of the mean trends. In a study by Dezelac et al [90], a gunshot was used for sound insulation measurements. Similar results were found in a comparison between the apparent sound reduction index of a common partition obtained by the gunshot and conventional methods (utilizing a dodecahedron speaker).…”

Section: Gunshotmentioning

confidence: 99%

“…Similar results were found in a comparison between the apparent sound reduction index of a common partition obtained by the gunshot and conventional methods (utilizing a dodecahedron speaker). An advantage that a gunshot has as an impulsive sound source is that it offers the possibility of removing the flanking transmission, since a gun is much more decoupled with a floor, than a heavy loudspeaker [90].…”

Section: Gunshotmentioning

confidence: 99%

See 3 more Smart Citations

Review of Acoustic Sources Alternatives to a Dodecahedron Speaker

Papadakis

Stavroulakis

2019

Applied Sciences

View full text Add to dashboard Cite

An omnidirectional source is required in many acoustic measurements. Commonly a dodecahedron speaker is used but due to various factors (e.g., high cost, transportation difficulties) other acoustic sources are sometimes preferred. In this review, fifteen acoustic source alternatives to a dodecahedron speaker are presented while emphasis is placed on features such as omnidirectionality, repeatability, adequate sound pressure levels, even frequency response, accuracy in measurement of acoustic parameters and fulfillment of ISO 3382-1 source requirements. Some of the alternative acoustic sources have the appropriate features to provide usable results for acoustic measurements, some have acoustic characteristics better than a dodecahedron speaker (e.g., omnidirectionality in the high-frequency range), while some can potentially fulfill the ISO 3382-1 source requirements. Collected data from this review can be used in many areas (e.g., ISO measurements, head-related transfer functions measurements) for the appropriate selection of an acoustic source according to the expected use. Finally, suggestions for uses and future work are given aimed at achieving further advances in this field.

show abstract

Section: Gunshotmentioning

confidence: 99%

Section: Gunshotmentioning

confidence: 99%

Section: Gunshotmentioning

confidence: 99%

Section: Gunshotmentioning

confidence: 99%

See 2 more Smart Citations

Review of Acoustic Sources Alternatives to a Dodecahedron Speaker

Papadakis

Stavroulakis

2019

Applied Sciences

View full text Add to dashboard Cite

show abstract

“…The debate is still open and relevant research is being done on different topics such as measurement procedures at low frequencies topics [16], effect of low frequency inclusion on measurement uncertainty assessment ratings [17][18][19] and subjective/objective aspects of sound insulation descriptors [20][21][22][23], just to mention some of the most recent studies related to the harmonization of sound insulation descriptors.…”

Section: Introductionmentioning

confidence: 99%

Translation between existing and proposed harmonized airborne sound insulation descriptors: A statistical approach based on in-situ measurements

et al. 2017

View full text Add to dashboard Cite

A standard defining a common acoustic classification scheme for dwellings is under development by ISO TC42/SC2/WG29 based on the outcomes of European project COST Action TU0901. The proposal stands on the assumption that in the long term many countries will establish building acoustic requirements using a harmonized set of descriptors. In this scenario most countries will need to estimate the influence on their current airborne sound insulation requirements due to the new descriptor. This paper investigates a statistical method to obtain translation equations between existing and proposed descriptors, based on the analysis of a significant set of in-situ measurements. Several translation equations are proposed, and the effect of the building system such as heavy and light weight walls. Results show that, although it is possible to propose a single translation equation for each existent descriptor, in some cases the spread around the proposed translation line is significant. Overall, the effect of building system is more noticeable if different frequency range descriptors are involved in the translation. For some existent descriptors, the obtained translation is compared with the theoretical method proposed within the findings of COST TU0901. When considering only lightweight walls or the full data set, there is no good agr eement between both methods, but for heavyweight walls they converge. Existing requirements in most European countries have been translated into the proposed descriptor DnT,50 ≈ DnT,w + C50-3150 using the obtained equations. This provides valuable information and an insight for government and building regulation policy makers when updating their legislation.

show abstract